body{
    background-image: url("./repeated-square-dark.png");
}
#show{
    position:relative;
    border: 1px solid #555;
    font-size: 22px;
    width: 50%;
    background: #ebebeb;
}
#show_all{
    position:absolute;
    border: 1px solid #555;
    font-size: 22px;
    left: 60%;
    width: 30%;
    top: 5%;
    background: #ebebeb;
}
.submit_students{
    position: absolute;
    border: 1px solid #555;
    font-size: 16px;
    width: 100%;
    height: 70%;
    background: #ebebeb;
}
.info_table{
    position: absolute;
    border: 1px solid #555;
    font-size: 16px;
    width: 50%;
    height: 70%;
    background: #ebebeb;
}
.info_table th{
    font-size: 32px;
    left: 25%;
    position: relative;
    background: #dedede;
}
.info{
    font-size: 20px;
    left: 0;
    width: 30px;
    height: 30px;
    border: 2px solid #d5d5d5;
    border-radius: 15px;
}
.info_form span{
    font-size: 16px;
}
#people0 input，#extra_info input{
    width: 100px;
}
.submit{
    width: 100px;
    height: 40px;
    background: #3388ff;
}
